Marcus, I am about to post a question on this forum about a "Kodak Adjustable Tank" and see if I can find just how many sizes of film it can do. I am quite certain it can handle the size you asked after but tune to this 'Bat Station' just to be sure.
FR tanks have adjustable slots, but since they're built for 4x5 max I'm not sure if the 5 1/2 dimension will fit. But they're usually pretty cheap on eBay so it should not cost much to find out.